A new analysis by Greenpeace's Energy Desk has found that nine Chinese cities experienced more days of extreme smog than Beijing last year, The Guardian reported.

The city of Xingtai fared the worst, with 129 days of emergency air pollution, while Beijing suffered 60 days of pollution surpassing emergency levels. China's Premier Li Keqiang recently "declared war" on pollution and said it was "nature's red-light warning against the model of inefficient and blind development."